Anomalous Behavior of Acoustic Attenuation in Ge:Sb under [001] Magnetic Field

概要

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Magnetic field effect on the acoustic attenuation at 0.83 and 3.35 GHz in 0.45and 1.7 x 10" Sb/cm' doped Ge was measured in tlte [001] magnetic field up to60 kG at liquid He temperatures. The experimental results are summarized asfollows: (1) The attenuation decreases with the field and shows a minimtun at27 kG and then increases. (2) The position of the tninimum point is nearly in-dependent of the donor concentration, the temperature, and the frequency.(3) The magnitude of the effect shows a sub-linear dependettce on the donorconcentration. The experimental results were compared with a theoretical cal-culation based on the shrinkage effect of the donor wave function to the phononscattering by the neutral donor electrons at the ground state. The theory explainsthe decrease of the attenuation at lower fields, but does not explain the anomalousincrease at higher fields.
社団法人日本物理学会の論文
1983-11-15